Hello priyanka,
Annexure 9 will be in the business rules in josaa official website. Here is the link for josaa official website.
https://josaa.nic.in/webinfocms/Public/home.aspx
You can go through this link and check the business rules and the download the annuxure 9 from that website. Fill that annexure 9 and submit to the reporting centres. Annexure 9 is the undertaking by the candidate letter.hope this answer will helps you.
Thank you.